Which option best matches the description of apoptosis as a self-destruct mechanism?

• A. Self-renewal
• B. Self-destruction
• C. Self-destruct
• D. Self-repair

Answer: (C)

Apoptosis is a controlled self-destruct program that cells use to remove damaged or unnecessary cells in a regulated way, without triggering a messy inflammatory response. The phrase that best captures this description is self-destruct, because it conveys purposeful, orderly destruction carried out by the cell’s own machinery. In apoptosis, signaling pathways activate a cascade of proteolytic enzymes (caspases) that systematically dismantle cellular components, leading to cell shrinkage, DNA fragmentation, membrane changes, and the exposure of signals that recruit phagocytes to clean up the dead cell. This contrasts with self-renewal, which means cell division to replace cells, or self-repair, which refers to restoring tissue after damage.